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Instrument landing system
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Patent number 4,680,587
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Issue date Jul 14, 1987
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Sundstrand Data Control, Inc.
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John P. Chisholm
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G01 - MEASURING TESTING
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Two-way ranging system
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Patent number 4,438,435
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Issue date Mar 20, 1984
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International Standard Electric Corporation
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Gunter Hofgen
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G01 - MEASURING TESTING
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3925750
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Patent number 3,925,750
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Issue date Dec 9, 1975
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G01 - MEASURING TESTING
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3900848
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Patent number 3,900,848
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Issue date Aug 19, 1975
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G01 - MEASURING TESTING
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3900868
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Patent number 3,900,868
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Issue date Aug 19, 1975
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G01 - MEASURING TESTING
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3825929
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Patent number 3,825,929
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Issue date Jul 23, 1974
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G01 - MEASURING TESTING
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3787846
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Patent number 3,787,846
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Issue date Jan 22, 1974
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G01 - MEASURING TESTING
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3742496
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Patent number 3,742,496
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Issue date Jun 26, 1973
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G01 - MEASURING TESTING
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3728728
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Patent number 3,728,728
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Issue date Apr 17, 1973
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G01 - MEASURING TESTING
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3719943
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Patent number 3,719,943
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Issue date Mar 6, 1973
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G01 - MEASURING TESTING
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3716857
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Patent number 3,716,857
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Issue date Feb 13, 1973
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G01 - MEASURING TESTING
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3706992
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Patent number 3,706,992
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Issue date Dec 19, 1972
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G01 - MEASURING TESTING